Hurry and get this super-cool kit before Adafruit quits selling them!
This kit from Adafruit (one of our favorite sources for all things fun and nerdy) is made with a retro Russian tube that is getting hard to find.
From the manufacturer:
Complete kit comes with a 110/220V 9VDC power supply (a $1 plug adapter from your local hardware store will allow it to be used worldwide), all components including PCB, vacuum fluorescent tube, backup battery and a clear acrylic enclosure. Assembly is required! This kit is made of through-hole components but is best built by someone with previous soldering experience as there are many parts and steps.
Currently retails for $85.00.